<template>
  <div class="player" v-show="playlist.length>0">
      <transition name="normal"
                @enter="enter"
                @after-enter="afterEnter"
                @leave="leave"
                @after-leave="afterLeave"
      >
      <div class="normal-player" v-show="fullScreen">
        <div class="background">
          <img width="100%" height="100%" :src="currentSong.image">
        </div>
        <div class="top">
          <div class="back" @click="back">
            <i class="icon-back"></i>
          </div>
          <h1 class="title" v-html="currentSong.name"></h1>
          <h2 class="subtitle" v-html="currentSong.singer"></h2>
        </div>
        <div class="middle"
         @touchstart.prevent="middleTouchStart"
             @touchmove.prevent="middleTouchMove"
             @touchend="middleTouchEnd"
        >
          <div class="middle-l" ref="middleL">
            <div class="cd-wrapper" ref="cdWrapper">
              <div class="cd" :class="cdCls">
                <img class="image" :src="currentSong.image">
              </div>
              </div>
               <div class="playing-lyric-wrapper">
              <div class="playing-lyric">{{playingLyric}}</div>
            </div>
          </div>
           <scroll class="middle-r" ref="lyricList" :data="currentLyric && currentLyric.lines">
            <div class="lyric-wrapper">
              <div v-if="currentLyric">
                <p ref="lyricLine"
                   class="text"
                   :class="{'current': currentLineNum ===index}"
                   v-for="(line,index) in currentLyric.lines">{{line.txt}}</p>
              </div>
            </div>
          </scroll>
        </div>
        <div class="bottom">
          <div class="dot-wrapper">
            <span class="dot" :class="{'active':currentShow==='cd'}"></span>
            <span class="dot" :class="{'active':currentShow==='lyric'}"></span>
          </div>
           <div class="progress-wrapper">
            <span class="time time-l">{{format(currentTime)}}</span>
            <div class="progress-bar-wrapper">
              <progress-bar :percent="percent" @percentChange="onProgressBarChange"></progress-bar>
            </div>
            <span class="time time-r">{{format(currentSong.duration)}}</span>
          </div>
          <div class="operators">
            <div class="icon i-left" @click="changeMode">
              <i :class="iconMode"></i>
            </div>
            <div class="icon i-left" :class="disableCls">
              <i @click="prev" class="icon-prev"></i>
            </div>
            <div class="icon i-center" :class="disableCls">
              <i @click="togglePlaying" :class="playIcon"></i>
            </div>
            <div class="icon i-right" :class="disableCls">
              <i @click="next" class="icon-next"></i>
            </div>
            <div class="icon i-right">
              <i class="icon icon-not-favorite"></i>
            </div>
          </div>
        </div>
      </div>
      </transition>
   <transition name="mini">
      <div class="mini-player" v-show="!fullScreen" @click="open">
        <div class="icon">
          <img :class="cdCls" width="40" height="40" :src="currentSong.image">
        </div>
        <div class="text">
          <h2 class="name" v-html="currentSong.name"></h2>
          <p class="desc" v-html="currentSong.singer"></p>
        </div>
        <div class="control">
          <progress-circle :radius="radius" :percent="percent">
            <i @click.stop="togglePlaying" class="icon-mini" :class="miniIcon"></i>
          </progress-circle>
        </div>
        <div class="control">
          <i class="icon-playlist"></i>
        </div>
      </div>
    </transition>
    <audio ref="audio" :src="currentSong.url" @canplay="ready" @error="error" @timeupdate="updateTime"
    @ended="end" ></audio>
  </div>
</template>

<script type="text/ecmascript-6">
import { mapGetters, mapMutations } from "vuex";
import animations from "create-keyframe-animation";
import { prefixStyle } from "common/js/dom";
import ProgressBar from "base/progress-bar/progress-bar";
import ProgressCircle from 'base/progress-circle/progress-circle'
import { playMode } from "common/js/config";
import {shuffle} from 'common/js/util'
import Lyric from 'lyric-parser'
import Scroll from 'base/scroll/scroll'

const transform = prefixStyle("transform");
const transitionDuration = prefixStyle('transitionDuration')

export default {
  
    data() {
      return {
        songReady: false,
        currentTime: 0,
        radius: 32,
        currentLyric: null,
        currentLineNum: 0,
        currentShow: "cd",
        playingLyric: ""
      }
    },
    
    computed: {
    cdCls() {
      return this.playing ? "play" : "play pause";
    },
    playIcon() {
      return this.playing ? "icon-pause" : "icon-play";
    },
    iconMode(){
      return this.mode===playMode.sequence? 'icon-sequence':this.mode===
      playMode.loop ? 'icon-loop':'icon-random'
    },
    miniIcon() {
      return this.playing ? "icon-pause-mini" : "icon-play-mini";
    },
    disableCls() {
      return this.songReady ? "" : "disable";
    },
    percent() {
      return this.currentTime / this.currentSong.duration;
    },
    ...mapGetters([
      "currentSong",
      "fullScreen",
      "playlist",
      "playing",
      "currentIndex",
      "mode",
      "sequenceList"
    ])
  },
   created() {
      this.touch = {}
    },
  methods: {
    back() {
      this.setFullScreen(false);
    },
    open() {
      this.setFullScreen(true);
    },
    enter(el, done) {
      const { x, y, scale } = this._getPosAndScale();

      let animation = {
        0: {
          transform: `translate3d(${x}px,${y}px,0) scale(${scale})`
        },
        60: {
          transform: `translate3d(0,0,0) scale(1.1)`
        },
        100: {
          transform: `translate3d(0,0,0) scale(1)`
        }
      };
      animations.registerAnimation({
        name: "move",
        animation,
        presets: {
          duration: 400,
          easing: "linear"
        }
      });
      animations.runAnimation(this.$refs.cdWrapper, "move", done);
    },
    afterEnter() {
      animations.unregisterAnimation("move");
      this.$refs.cdWrapper.style.animation = "";
    },
    leave(el, done) {
      this.$refs.cdWrapper.style.transition = "all 0.4s";
      const { x, y, scale } = this._getPosAndScale();
      this.$refs.cdWrapper.style[
        transform
      ] = `translate3d(${x}px,${y}px,0) scale(${scale})`;
      this.$refs.cdWrapper.addEventListener("transitionend", done);
    },
    afterLeave() {
      this.$refs.cdWrapper.style.transition = "";
      this.$refs.cdWrapper.style[transform] = "";
    },
    togglePlaying() {
        if (!this.songReady) {
          return
        }
        this.setPlayingState(!this.playing)
        if (this.currentLyric) {
          this.currentLyric.togglePlay()
        }
      },
      end() {
        if (this.mode === playMode.loop) {
          this.loop()
        } else {
          this.next()
        }
      },
       loop() {
        this.$refs.audio.currentTime = 0
        this.$refs.audio.play()
        if (this.currentLyric) {
          this.currentLyric.seek(0)
        }
      },
   next() {
        if (!this.songReady) {
          return
        }
        if (this.playlist.length === 1) {
          this.loop()
          return
        } else {
          let index = this.currentIndex + 1
          if (index === this.playlist.length) {
            index = 0
          }
          this.setCurrentIndex(index)
          if (!this.playing) {
            this.togglePlaying()
          }
        }
        this.songReady = false
      },
     prev() {
        if (!this.songReady) {
          return
        }
        if (this.playlist.length === 1) {
          this.loop()
          return
        } else {
          let index = this.currentIndex - 1
          if (index === -1) {
            index = this.playlist.length - 1
          }
          this.setCurrentIndex(index)
          if (!this.playing) {
            this.togglePlaying()
          }
        }
        this.songReady = false
      },
    ready() {
      this.songReady = true;

    },
    error() {
      this.songReady = true;
    },
    updateTime(e) {
      this.currentTime = e.target.currentTime;
    },
    format(interval) {
      interval = interval | 0;
      const minute = (interval / 60) | 0;
      const second = this._pad(interval % 60);
      return `${minute}:${second}`;
    },
    onProgressBarChange(percent) {
      const currentTime = this.currentSong.duration * percent;
      this.$refs.audio.currentTime = currentTime;
      if (!this.playing) {
        this.togglePlaying();
      }
      if (this.currentLyric) {
        this.currentLyric.seek(currentTime * 1000);
      }
    },
    changeMode() {
      const mode = (this.mode + 1) % 3;
      this.setPlayMode(mode);
      let list=null
      if(mode==playMode.random)
      {
       list=shuffle(this.sequenceList)
      }else{
        list=this.sequenceList
      }
       this.resetCurrentIndex(list)
      this.setPlaylist(list)
    },
    resetCurrentIndex(list)
    {
   let index=list.findIndex((item)=>{
     return item.id===this.currentSong.id
   })
   this.setCurrentIndex(index)
    },
      getLyric() {
        this.currentSong.getLyric().then((lyric) => {
          if (this.currentSong.lyric !== lyric) {
            return
          }
          this.currentLyric = new Lyric(lyric, this.handleLyric)
          if (this.playing) {
            this.currentLyric.play()
          }
        }).catch(() => {
          this.currentLyric = null
          this.playingLyric = ''
          this.currentLineNum = 0
        })
      },
       handleLyric({lineNum, txt}) {
        this.currentLineNum = lineNum
        if (lineNum > 5) {
          let lineEl = this.$refs.lyricLine[lineNum - 5]
          this.$refs.lyricList.scrollToElement(lineEl, 1000)
        } else {
          this.$refs.lyricList.scrollTo(0, 0, 1000)
        }
        this.playingLyric = txt
      },
      middleTouchStart(e) {
        this.touch.initiated = true
        const touch = e.touches[0]
        this.touch.startX = touch.pageX
        this.touch.startY = touch.pageY
      },
      middleTouchMove(e) {
        if (!this.touch.initiated) {
          return
        }
        const touch = e.touches[0]
        const deltaX = touch.pageX - this.touch.startX
        const deltaY = touch.pageY - this.touch.startY
        if (Math.abs(deltaY) > Math.abs(deltaX)) {
          return
        }
        const left = this.currentShow === 'cd' ? 0 : -window.innerWidth
        const offsetWidth = Math.min(0, Math.max(-window.innerWidth, left + deltaX))
        this.touch.percent = Math.abs(offsetWidth / window.innerWidth)
        this.$refs.lyricList.$el.style[transform] = `translate3d(${offsetWidth}px,0,0)`
        this.$refs.lyricList.$el.style[transitionDuration] = 0
        this.$refs.middleL.style.opacity = 1 - this.touch.percent
        this.$refs.middleL.style[transitionDuration] = 0
      },
      middleTouchEnd() {
        let offsetWidth
        let opacity
        if (this.currentShow === 'cd') {
          if (this.touch.percent > 0.1) {
            offsetWidth = -window.innerWidth
     opacity=0
            this.currentShow = 'lyric'
          } else {
            offsetWidth = 0
            opacity=1
          }
        } else {
          if (this.touch.percent < 0.9) {
            offsetWidth = 0
            this.currentShow = 'cd'
        opacity=1
          } else {
            offsetWidth = -window.innerWidth
           opacity=0
          }
        }
        const time = 300
        this.$refs.lyricList.$el.style[transform] = `translate3d(${offsetWidth}px,0,0)`
        this.$refs.lyricList.$el.style[transitionDuration] = `${time}ms`
         this.$refs.middleL.style.opacity = opacity
         this.$refs.middleL.style[transitionDuration] = `${time}ms`
        // this.touch.initiated = false
      },

    _pad(num, n = 2) {
      let len = num.toString().length;
      while (len < n) {
        num = "0" + num;
        len++;
      }
      return num;
    },
    _getPosAndScale() {
      const targetWidth = 40;
      const paddingLeft = 40;
      const paddingBottom = 30;
      const paddingTop = 80;
      const width = window.innerWidth * 0.8;
      const scale = targetWidth / width;
      const x = -(window.innerWidth / 2 - paddingLeft);
      const y = window.innerHeight - paddingTop - width / 2 - paddingBottom;
      return {
        x,
        y,
        scale
      };
    },
    ...mapMutations({
      setFullScreen: "SET_FULL_SCREEN",
      setPlayingState: "SET_PLAYING_STATE",
      setCurrentIndex: "SET_CURRENT_INDEX",
      setPlayMode: "SET_PLAY_MODE",
      setPlaylist:"SET_PLAYLIST",
    })
  },
  watch: {
     currentSong(newSong, oldSong) {
        if (!newSong.id) {
          return
        }
        if (newSong.id === oldSong.id) {
          return
        }
        if (this.currentLyric) {
          this.currentLyric.stop()
          this.currentTime = 0
          this.playingLyric = ''
          this.currentLineNum = 0
        }
        clearTimeout(this.timer)
        this.timer = setTimeout(() => {
          this.$refs.audio.play()
          this.getLyric()
        }, 1000)
      },
    playing(newPlaying) {
      const audio = this.$refs.audio;
      this.$nextTick(() => {
        newPlaying ? audio.play() : audio.pause();
      });
    }
  },
  components: {
      ProgressBar,
      ProgressCircle,
      Scroll,
      //Playlist
  }
};
</script>

<style scoped lang="stylus" rel="stylesheet/stylus">
@import '~common/stylus/variable';
@import '~common/stylus/mixin';

.player {
  .normal-player {
    position: fixed;
    left: 0;
    right: 0;
    top: 0;
    bottom: 0;
    z-index: 150;
    background: $color-background;

    .background {
      position: absolute;
      left: 0;
      top: 0;
      width: 100%;
      height: 100%;
      z-index: -1;
      opacity: 0.6;
      filter: blur(20px);
    }

    .top {
      position: relative;
      margin-bottom: 25px;

      .back {
        position: absolute;
        top: 0;
        left: 6px;
        z-index: 50;

        .icon-back {
          display: block;
          padding: 9px;
          font-size: $font-size-large-x;
          color: $color-theme;
          transform: rotate(-90deg);
        }
      }

      .title {
        width: 70%;
        margin: 0 auto;
        line-height: 40px;
        text-align: center;
        no-wrap();
        font-size: $font-size-large;
        color: $color-text;
      }

      .subtitle {
        line-height: 20px;
        text-align: center;
        font-size: $font-size-medium;
        color: $color-text;
      }
    }

    .middle {
      position: fixed;
      width: 100%;
      top: 80px;
      bottom: 170px;
      white-space: nowrap;
      font-size: 0;

      .middle-l {
        display: inline-block;
        vertical-align: top;
        position: relative;
        width: 100%;
        height: 0;
        padding-top: 80%;

        .cd-wrapper {
          position: absolute;
          left: 10%;
          top: 0;
          width: 80%;
          height: 100%;

          .cd {
            width: 100%;
            height: 100%;
            box-sizing: border-box;
            border: 10px solid rgba(255, 255, 255, 0.1);
            border-radius: 50%;

            &.play {
              animation: rotate 20s linear infinite;
            }

            &.pause {
              animation-play-state: paused;
            }

            .image {
              position: absolute;
              left: 0;
              top: 0;
              width: 100%;
              height: 100%;
              border-radius: 50%;
            }
          }
        }

        .playing-lyric-wrapper {
          width: 80%;
          margin: 30px auto 0 auto;
          overflow: hidden;
          text-align: center;

          .playing-lyric {
            height: 20px;
            line-height: 20px;
            font-size: $font-size-medium;
            color: $color-text-l;
          }
        }
      }

      .middle-r {
        display: inline-block;
        vertical-align: top;
        width: 100%;
        height: 100%;
        overflow: hidden;

        .lyric-wrapper {
          width: 80%;
          margin: 0 auto;
          overflow: hidden;
          text-align: center;

          .text {
            line-height: 32px;
            color: $color-text-l;
            font-size: $font-size-medium;

            &.current {
              color: $color-text;
            }
          }
        }
      }
    }

    .bottom {
      position: absolute;
      bottom: 50px;
      width: 100%;

      .dot-wrapper {
        text-align: center;
        font-size: 0;

        .dot {
          display: inline-block;
          vertical-align: middle;
          margin: 0 4px;
          width: 8px;
          height: 8px;
          border-radius: 50%;
          background: $color-text-l;

          &.active {
            width: 20px;
            border-radius: 5px;
            background: $color-text-ll;
          }
        }
      }

      .progress-wrapper {
        display: flex;
        align-items: center;
        width: 80%;
        margin: 0px auto;
        padding: 10px 0;

        .time {
          color: $color-text;
          font-size: $font-size-small;
          flex: 0 0 30px;
          line-height: 30px;
          width: 30px;

          &.time-l {
            text-align: left;
          }

          &.time-r {
            text-align: right;
          }
        }

        .progress-bar-wrapper {
          flex: 1;
        }
      }

      .operators {
        display: flex;
        align-items: center;

        .icon {
          flex: 1;
          color: $color-theme;

          &.disable {
            color: $color-theme-d;
          }

          i {
            font-size: 30px;
          }
        }

        .i-left {
          text-align: right;
        }

        .i-center {
          padding: 0 20px;
          text-align: center;

          i {
            font-size: 40px;
          }
        }

        .i-right {
          text-align: left;
        }

        .icon-favorite {
          color: $color-sub-theme;
        }
      }
    }

    &.normal-enter-active, &.normal-leave-active {
      transition: all 0.4s;

      .top, .bottom {
        transition: all 0.4s cubic-bezier(0.86, 0.18, 0.82, 1.32);
      }
    }

    &.normal-enter, &.normal-leave-to {
      opacity: 0;

      .top {
        transform: translate3d(0, -100px, 0);
      }

      .bottom {
        transform: translate3d(0, 100px, 0);
      }
    }
  }

  .mini-player {
    display: flex;
    align-items: center;
    position: fixed;
    left: 0;
    bottom: 0;
    z-index: 180;
    width: 100%;
    height: 60px;
    background: $color-highlight-background;

    &.mini-enter-active, &.mini-leave-active {
      transition: all 0.4s;
    }

    &.mini-enter, &.mini-leave-to {
      opacity: 0;
    }

    .icon {
      flex: 0 0 40px;
      width: 40px;
      padding: 0 10px 0 20px;

      img {
        border-radius: 50%;

        &.play {
          animation: rotate 10s linear infinite;
        }

        &.pause {
          animation-play-state: paused;
        }
      }
    }

    .text {
      display: flex;
      flex-direction: column;
      justify-content: center;
      flex: 1;
      line-height: 20px;
      overflow: hidden;

      .name {
        margin-bottom: 2px;
        no-wrap();
        font-size: $font-size-medium;
        color: $color-text;
      }

      .desc {
        no-wrap();
        font-size: $font-size-small;
        color: $color-text-d;
      }
    }

    .control {
      flex: 0 0 30px;
      width: 30px;
      padding: 0 10px;

      .icon-play-mini, .icon-pause-mini, .icon-playlist {
        font-size: 30px;
        color: $color-theme-d;
      }

      .icon-mini {
        font-size: 32px;
        position: absolute;
        left: 0;
        top: 0;
      }
    }
  }
}

@keyframes rotate {
  0% {
    transform: rotate(0);
  }

  100% {
    transform: rotate(360deg);
  }
}
</style>